Cook garlic in the olive oil over medium-high heat in a large saucepan until lightly browned and fragrant. Next, add the minced pork and brown, stirring frequently to break it up into fine pieces. Stir in the tofu, ginger and reduce the heat to medium, stirring occasionally for about three minutes. Season with black bean sauce, soy sauce, sherry, and green onions. Serve over steamed rice.